Balancing device for high-speed honing machines



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INVENTOR. JOSEPH SUNNEN ATTORNEY J. SUNNEN BALANCING DEVICE FOR HIGH-SPEED HONING MACHINES F l G. 4.

May 19, 1953 Filed Jan 6 1950 Patented May 19, 1953 OFFICE BALANCING DEVICE FOR HIGH-SPEED HONING MACHINES Joseph Sunnen, Clayton, Mo.

Application January 6, 1950, Serial No. 137,123

. 4 Claims. ((11. 51-169) 1 This invention relates to high speed honing machines, and more particularly to adjustable spindle mounts or chucks for adjusting or correcting the eccentricity of the spindles of such machines, where the accuracy of the work may be impaired. by the hone carrying spindle being out of balance, or out of center. Since the optimum cutting speed of a hone is measured in feet per minute, and not in revolutions per minute, machine operated internal honing devices are operated at speeds which are increased as the diameter of the holes being finished is reduced. Where the hole diameter is in the order of one-half inch or less, the desired operating speed is so great as to set up undesirable vibrations unless the hone carrying spindle is dynamically balanced. At the same time, space limitations inherent in small hone sizes make it very difficult to obtain a balanced condition for an adjustable hone except at a particular point in the range of adjustment.

In small honing spindles, a single adjustable hone is frequently used in combination with a non-adjustable guide diametrically opposed to the hone. This results in an eccentric relation of the hone arbor to the hole which is being finished, and in order to avoid the undesirable vibration of the work due to the resulting violent gyration of the work, it has previously been necessary to slow the hone speed down far below the optimum cutting speed.

An object of this invention is to provide means for dynamically balancing machine operated hone spindles.

Another object of this invention is to provide a mount or chuck for hone spindles having means for adjusting the concentricity of the spindle so as to cause the working surfaces of the hone and guide to rotate in the same circle.

Other objects and advantages will appear from the following description and the accompanying drawings, in which like reference numerals refer to corresponding parts.

Figure 1 shows a somewhat diagrammatic sectional elevation of essential parts of a honing machine having my invention applied thereto.

Fig. 2 is a side View of a typical hone arbor of the type adapted for use with my invention.

Fig. 3 is a sectional view taken along the line 3-3 of Fig. 1 looking in the direction of the arrows.

Fig. 4 is a sectional elevation taken along the lines 44 of Fig. 1 looking in the direction of the arrows.

Fig. 5 is an end view of the mandrel with the hone in retracted position.

Fig. 6 is an end view ofthe mandrel with the bone in expanded position.

The reference numeral I shows the frame of a typical high speed honing machine which may be of the type shown in my Patent No. 2,377,588 from which more complete details may be obtained, if desired. The machine is provided with bearings 2 carrying a hollow main spindle 3 driven by a pulley 4. A feed rod 5 extends through the hollow spindle and is provided with a connection 6 to couple it to the hone arbor I whichmay be of the type shown in either of my Patents Nos. 2,376,850 and 2,376,851, to which reference may be had for further details. It should be noted that the use of the invention is not confined to any particular type of hone arbor and these examples are cited merely for illustration. The operating end of the spindle is provided with external screw threads, as illustrated at 8, to receive the spindle nose 9.

The spindle nose 9 comprisesa hollow member threaded to the main spindle at 8 and provided with a ground, flat shoulder 10 adjacent to an annular external groove or a recess portion II. This recessed portion II has a conical or tapered section I2, the smaller end of the taper being adjacent the ground shoulder I0 so that the screws l3 carried by the chuck I4 will firmly hold the end of the chuck in place against the shoulder 10.

The chuck 14 comprises a tubular member having a bore slightly larger than the enlarged portion [5 of the spindle nose 9 so as to leave a substantial amount of loose play for adjustment by means of the screws [3 which are threaded into the chuck I4 at an angle as indicated. By adjustment of the screws IS, the mounting of the mandrel can be adjusted eccentrically in order to make up for the eccentricity of the hone and guide caused by adjustment of the feed rod. The chuck I4 is adapted to receive the end of the mandrel or hone arbor l and a screw I1 is threaded into the chuck M at an angle so as to hold the hone arbor I in position. The chuck also carries a drive plate l8 held in position by screw [9 and provided with a lug 20 to engage and drive the hone arbor I.

The hone arbor used in the machine may be of any suitable type, but for illustration, attention is called to that shown in my Patent No. 2,377,588 and particularly in Figs. 2 and 8-11, inclusive, thereof. Also, see my Patents Nos. 2,376,850 and 2,376,851 for more complete details. It will be noted that by adjustment of the feed "that aremov ble conne'ctior?is -"arranged outer free en fre ing-est race Iyi'ngin so that the wear plate 65 lies-yj ustasiarirom the center as does the hone surface so that'they turn in the same circle with no resultant gyration of the work,

Iclaim: I, V I 1. In a honing machine including a housing,

a main spindle extending outwardly from the housing a spindle nose connected at one end to said mam-spindle and havirigiits' outer free e'nd portion formed with annular-recess tapering dutwa-rsi away from the Wall of the housing,

tionedbnsai endaeaet'e to b steamer, a p r-ahty' or adjatingserews earned a id sleeveg aid sfer ews tie g adapted tore mil wall' to'pos'ition "said spindle; said screws 4 g leeveat"substantially a 90 angle was res et'tbsaid tapered annular wan.

2. The streame 'r '1 characterize A portion of sa'idsemen nose andwithizrsailrsieeve reflecting said sleeve-to a driven member. I

Mounted in bearings, said spindle having a threaded port n spindle nose extension thr on o e en of the; spindleand in clu'ding an I a' 'nu1a1- ghaL-vin'g an: outwardly right angles d a or tension, the projecting portion of said spindle extension being formed with an annular recess defined in part by :a conical portion with its diameter decreasing toward the fiat face of said flange, a plurality of spaced screws threaded through said sleeve at such an angle as to have their axes intersect outwardly of said shoulder and adapted to engage said-conicalpbrtibn of said extension to concentrically adjust said sleeve with respect to the axis of the spindle and simultaneously urge the inner fiat end of the sleeve into engagement with the flat face of said shoulder means"for securing an arbor in the outer end portion of said sleeve, and means in said sleeve betwe'e'n 'the extension and the arbor for locking said arbor against rotation in said sleeve.

4. In a honing'm'achine, a hollow main driving spindle; chuck means associated with said spindle, said chuck means including an extension fixed t0 the end of said spindle; and atubu larmember arranged about said extension andradially spaced-from the extension; a hone arbor fixed in the tubular member against axial movement, a radially adjustable hone carried by the hone arbor,=a feed rod extendingth-rough saidspindle and said-extension to adjust the radial position of the hone insaid arbor, said extension being formed with an annular recess defined in part by an outwardly diverging tapered wallportion, screws extending through the tubular member and engaging said taperedportion to position the tubular member radiallywith respect to the eX- tension t'ocompensate for the adjustment-of said radially adjustable hone, and means-for securing said hone arbor against relative rotary movement Withrespect to said tubularmember, sa-id 'means being positioned between said extension and the adjacent end of said arbor.

JOSEPH SUNNEN.

References Cited in the file or this patent UNITED STATES PATENTS Number Name Date '1;'02 3;513 Gonard Apr. 16,1912 1,407,663 Mccanum Feb. 21, 1922 1511 52}; 'Standlee Oct. 14, 1924 1,533,875 McCleary Apr. 14', 1925 1;940, t55- Kilpela Dec. 19', 1933 2070338; Sunnen Fen-9, 193'? 2,092,116 I Iansen Sept. 7,1937 2,433,277 Cherry Sept. 14, 1948 zgsresc orfen Feb; 8, 1949 

